Cronch

When this spell is cast, every creature in a 5 foot radius of the caster automatically falls unconscious, every creature in a 10 foot radius of the caster must make a constitution saving throw, or fall unconscious, on a successful save, they have disadvantage on attack rolls for the duration of the spell, every creature in a 20 foot radius of the caster has disadvantage on attack rolls for the duration of the spell. it has no effect on the caster.

Any creature who knows this spell must make a wisdom saving throw every hour to not cast it.